Therefore, you would write it as follows:

30 = 2(2x) + 2y, and simplify and rewrite in standard form:

4x + 2y = 30

That’s it!

So you have two sides that are 2x and two sides that are y.

And all of it equals 30.

So,

2x + 2x + y + y = 30

4x + 2y = 30

So, you have the top (2x), the bottom (2x), the left side (y) and the right side (y).

Add them together:

2x+2x+y+y is the perimeter.

Your problem statement told you that it equals 30, so your equation is:

4x+2y = 30

P=2(l+w)

So…

30=2(2x+y) Or

30=4x+2y

ps. standered form means you just have to have x and y on the same side (ax + by = c) a b and c are the numbers and x and y are what you need to have on that side.

so 4x + 2y =30

and there you have it